反应详情

温度

90 °C

6-Chloro-N-(4-(chlorodifluoromethoxy)phenyl)-5-iodonicotinamide (Stage 247.2, 8 g, 17.43 mmol), pyrimidine-5-boronic acid (4.55 g, 34.9 mmol), PdCl2(dppf) (0.638 g, 0.871 mmol), Na2CO3 (26.1 mL of 2 M, 52.3 mmol), and DME (110 mL) were added to a vial, which was sealed, evacuated/purged with argon and the RM was stirred at 90° C. for 20 h. The RM was dissolved in EtOAc (200 mL), washed with water, dried over Na2SO4 and the solvent was evaporated off under reduced pressure. The residue was purified by flash chromatography (Silica gel column, 750 g, EtOAc/n-hexane 1:1) and recrystallized from EtOAc/iPr2O to give the title product as a pink solid. HPLC (Condition 10) tR=6.77 min, UPLC-MS (Condition 3) tR=1.05 min, m/z=409.0/411.0 [M−H]−; 1H-NMR (400 MHz, DMSO-d6) δ ppm 6.59 (d, J=8.60 Hz, 2H) 7.07 (d, J=8.99 Hz, 2H) 7.75 (d, J=1.95 Hz, 1H) 8.18-8.24 (m, 1H) 8.28 (s, 2H) 8.50 (s, 1H) 9.88 (s, 1H).

1. customwas sealed
2. customevacuated/purged with argon
3. dissolutionThe RM was dissolved in EtOAc (200 mL)
4. washwashed with water
5. dry with materialdried over Na2SO4
6. customthe solvent was evaporated off under reduced pressure
7. customThe residue was purified by flash chromatography (Silica gel column, 750 g, EtOAc/n-hexane 1:1)
8. customrecrystallized from EtOAc/iPr2O